Relay



July '26, 1927. 6,933

L. J. GIR ARD RELAY Filed NOV. 6. 1 925 1' INVENTM" I 1 Zaw z'rara?ATTORNEY Patented July 26, 1927.

UNITED STATES- LOUIS'JEAN airman, or' rmouvrntn Ar sUnEsNEs, salmon;

,636,933 PATENT orr ce.

BELLY;

Application filed November 6, 1925, Serial No. 67,284, and in FranceDecember 12, 1824.

The object of this invention is to provide an electro-magnetic relaywhich will permit the control, either directly or withthe. aid of anauxiliary electric circuit, of a circuit- 6 breaker releasing mechanism,or the opening andv closing of any electric circuit, by utilizing thevariation of theintensity of currenttraver'sing in the conductor whereinsaid relay is inserted to operate the same.

10 The action-of the relay can be instantaneousor retarded; and in thelatter case, it is merely necessary to connect any one of the.commonly-used retard ers to the relay.

. f Being adapted to operate with one 1mm- 1 dred ampere-turns,theim-proved relay does away with the serious drawbacks appertaining, onhigh tension, to generally used re- 1 lays which ofier a great numberofampereturns,(from 800 to: 1500) and which,v in consequence, involveconsiderablev self-inductance and current consumption.

The characteristic features of are as follows On a laminated core havingthe form of 2 an 'apertured cylinder is :wound. a 9 coil through whichflows the currentthe' intensity of which is desired tobe limited. Underaction of. the magnetic field developed in said core by said current, anarmature is operation drawn into the aperture or air-gap so provided,thereby tilting a leverthat controls either the circuit-breakerreleasing mechanismor. the opening or closing of an inter-. rupter ofthe auxiliary circuit. Adjustment in accordance with predeterminedintensity limits is effected byvarythe spacing between the armature andthecorer p I 1 Retardation. of action. is obtained'by in- 40terposingbetween a fixedcpoint. of the core and the end. of the. leverany suitable retardingdevice. I H

Said. relay is completed by a short-circuit or overload opera-teddevice. Locking is "eflg'ected means of a soft-iron pallet attracted bya magnetic leakage field produced ina. supplemental passage or gap inthe core,

1 said pallet permitting the movable portion of the relay to be lockedso as positively to prevent recoupling. Since. the leakage fieldproduced: by the intensity at which the relay is set to "operate isinsufiicient-to' attract the soft-iron pallet, and sincethe movableportion is normally unlocked, recoupling re-- mains possible until saidintensity" is eX- ceeded.

in the eleetricicircuit by means of the Ar and of the relay-supportingmember Figure 5 is asectional view according to line i of Figure 4.

"The improved device comprises a laminated sheet iron annular core C(Figure 1) which is open or" cut away along its radii n+6 andc-d(Figurrefi) and surrounded by a lwinding L, one ,terminalof whic'h isindicated at A; said device being connected part The winding isconnected to thebod-y of the relay at point Z(Fig. 3). g A free annularspace: is provided. between the sheet-iron core and the winding so as toavoid currentshunts into the core.-v

An armature D;(Figures 1,. 2, 4. and 5),

' also laminated, and having such a diameter and such aztorm as to closecompletely the cut away portion or opening. a-,-?ic-dof the core,iscarried by a bar. F rocking on trunnions or pins EI carried. by aframe G G (Figure 4), secured on core 0..

, H (Figure 1) indicates a series of tapped holes formed in thestationary part or body of the relay and adapted to receiveinterchangeably a stop pin or, the like WhlOh'lS designed to beengaged.by the adjacent end ofbar F when the latter is in its positionof rest,whereby suchv position can be varied with relation to core, C vas wellas the space between parts A andd' and, hence, the current intensityrequired for operation. j

The bar or lever F carries adjacent its stopeengaging ends .two hooks II adapted to beconnected, one to the control rod-of the. circuit-breakerreleasing mechanism or the operating rod of the aux1l1ary:c1rcuit n--terruptenand the other tothe end of the retarding. device, said deviceitself being secured at K (Figure 1) to the stationary body.

- The locking device is constructed as V fol lows: t

On the-stationary portion of the relay, at

the upper part. and on each side of the gap or opening a bcd', arelocated: two bearings' L L?(Figures :2 and which is a .movement of thepallet caused s to be p v vice maybe utilized as well with alternatingdescribed embodi journaled aspindle M carrying at one end a fixed arm N"provided with a notch D.

On spindle M and at the middle thereof is fixed a term P provided Withmcounter-weight and carrying a spur Q. Said spur is adapted to penetrateinto a seat R" purpose in armature D of alletto be adjusted according tothe overoad at which the device istorbe locked, such adjustment beingefiecte'd' by moving, the screw endwise so as to limit the inward byspringT. y The 0 ration is as .follows: I

1. Wit the'intensity at which the relay ,is' adjusted to be operated,the magnetic field 'produced in the auxiliary aibg'ap U isl insuflicientto attract pallet S, and'spur Q'remains in inoperative position aboveseat being held against movement by spindle which is itself keptstationa "by arm iN' bearing against the upper end 0 pallet S.

2. When an overload occurs, theleakages into the aforesaidfield increaseits force to the 'o'int where it is sufiicient to attract pallet,whereupon said pallet comes to e age .a into notch O andreleases memberN. pur 'Q, then influenced bymember .P and the counter-weight thereofdro into seat R in armature D, thus 'lockingt e armature and its bar Fand related parts against movement and thereby preventing any subsequentrecou'ling. a a

' clearlyunderstood thatthe deas with direct current and that, the abovetative, the right is reserved to introduce any desirable constructionalmodifications without'being deemed to have departed" from the scope ofthe invention.

Having now, particularly ascertained and fully'disclosed the nature ofmy saidinven- 1; 'An eleotro-magnetic relay, comprising a fitconformably in the core opening; avlever pivoted intermedlate its endstothe station- ;tion as well aslthe. manner in which the same istoperformed, I declare that what I claim is:

stationary body portion a magnet carried thereby and embodying anannular core pr0-' vided with a lateral opening, and a winding"encircling said core; an armatureshaped to ary body portion of the relaybelow said core and carrying the armatureon one end thereof; and anadjustable stop carried by in which the stop consists'o A stop screw Vpermits the position of the 'trip member directly associated wit1,ese,9ss

said @body" rtion for engagement by the other end'o the levertodetermine the normal position of the armature with relation tothecore;

2. A relay, according to claim 1, in which the stationary body portionincludes a member formed with a series of perforations, and

a pin for interchangeable engagement in said perforations. 3. Anelectro-magnetic relay, comprising a magnet, an armature therefor, adetent mounted on the magnet for positive engagement with the armatureto lock the latter against movement, and an overload-o rated tripmovable independently of and re atively to the detent and actingnormally to hold the same in ino erative position but, releasing itautomatically when an overload occurs.

4. An electro-magnetic relay, comprising 'to be drawn toward the magnetwhen an overload'occurs so as to release the detent. 5. Anelectro-in'agnetic relay, comprisi a magnet, an armature therefor provid(with a seat, a detent mounted on the magnet and engageable in said seatto lock the armature against movement, and an overloadoperated tripmovable independently of and relatively to the detent and actingnormally to hold the same in inoperative position but I releasing itautomatically when anoverload occurs.

6. An electro-ma'gnetic relay, comprising a magnet, an armature therefora spindle mounted on the magnet and provided with a counterweight forrocking it in one direction,

I D a detent connected to the spindle and adaptnt being in no wayllmlcounterweight, and an overload operated trip movable independentlyof and relatively to k the detent and acting normally to hold thespindle against rocking but automatically releasing it when an overloadoccurs.

7. An electro-r'nagnetic relay, comprising a magnet, an armaturetherefor, a spindle mounted on the magnet and provided with acounterweight for rocking it in one direction, a detent connected to thespindle and adapted to engage and lock the armature against movementwhen said spindle is rocked by its counterweight; an arm on the spindlehaving a notch in] its lower surface; and a trip normally engaging thesaid lower surface of said arm at one side of the notch to'hold saiddetent and spindle against operation but automatically movable into saidthe main gap, a detent on the magnet engageable with the armature tolock the latter against movement, and a 'trip cooperative with theauxiliary gap and acting tohold the detent normally in inoperativeposition; said trip being normally spaced from said auxiliary gap butmoved automatically to-- ward the same when an overload occurs so as torelease the detent.

9. An electro-magnetic relay, comprising a magnet having an air gap, anarmature associated with the magnet, a detent on the a magnet engageablewith the armature to lock it against movement, and a trip cooperativewith said air gap and acting to hold the detent normally in inoperativeposition; said trip being normally spaced from the gap but movedautomatically toward the same when an overload occurs so as to releasethe detent.

10. An electro-magnetic relay, according to claim 9, in which the tripembodies a spring blade mounted on the body of the relay, and a softiron member attached to said blade and normally pulled away fromthe'magnet by the action of the blade.

In testimony whereof I afiix my signature.

LOUIS JEAN GIRARD.

